Help for the unknowing

[Drmcar]

Please educate me. I am thinking of gettingj one of these fantastic cars and have a few basic questions. What is ;the difference, if any ,between a 1999 and 2001 GTS. Also what does the additionj of a Hennessay computer do for performance and is this a good thing. Thanks Garth

 

[lleone]

Biggest difference color choices and no abs in the 1999.
I didn't think there was a HMS computer for a '99 or '01.
Was it a custom/one-off job?

 

[Bonkers]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Drmcar:
Also what does the additionj of a Hennessay computer do... <HR></BLOCKQUOTE>

Oh I say kill the value by about $60k...

 

[Drmcar]

The dealer told me the '99 had Hen. hoses, exhaust and computer. That is all I know. Garth

 

[HogWhisperer]

The 'computer' is probably a Mopar Performance ECU. John had a good source on those. What's it do? Biggest benefit on a car with no cats is that it has no rear O2 sensing. This not only keeps the check engine light off, it also maintains the correct A/F mixture (as it does when the stock ECU is used and it is getting nominal voltages from the rear sensors) When the stock ECU doesn't get the proper voltages from the rear O2 sensors and it won't when the CATS are off, the ECU richens the A/F mixture and the car runs rich. This results in robbing the car of a little HP but more importantly, in causing the car to 'blubber' on idle.

I'd check to see if the car has CATS. If it does, the Mopar ECU, IMHO, is not of much benefit. The CATS are in the side sills...

Also, if the car doesn't have the CATS with it, you should know that they are expensive to replace. The dealer may be unaware of whether the CATS are on it or not. I'd make'em check.

Nothing wrong with Hennessey headers or tubes.

Biggest difference between '99 and '01 Vipers?
ABS on the '01 - Good
Forged Pistons on the '99 - Good

There's my opinion. Good luck.

 

[MichaelP]

You are in PA? IF so take a trip to see the salespeople at Wood House and the other Dodge dealership that advertises on this board. Both have TONS of satisfied Viper owners.

I would NEVER buy any Viper that has the name Hennessey attatched to it any way shape or form. The jury is still out but it MAY just bring the resale value of your car DOWN&gt;

He has been indicated in lying, stealing etc as was said here on this board and in magazines.

Do a search under "buying a Viper" "Which car dealer" etc you will find a lot of useful info.

 

[Bonkers]

Which dealer? Price has a 99 that I haven't checked out yet but other than that there aren't any intresting cars around here that I've come across.

Vipermad is wise. Listen carefully.

 

[Drmcar]

The dealer is in PA. Also was told that the computer is a swap out and they have the origional one. garth